The Middle East Respiratory Syndrome (MERS) had been diffused in unprecedently rapid manner since it outbreak on 20th of May, 2015. There were several reasons why MERS spread fast in South Korea. There was little information regarding MERS. The authority did not open information about which hospitals or clinics were infected to the public. And the liable patients of infection were not insulated appropriately. Totally the authority and medical institutions have failed to prevent MERS’s contagion quickly. Experts of infection diseases from WHO and academy contended reportedly people do not have to worry excessively. Most concerns do not have scientific or reasonable foundation. However, people’s economic activity was seriously slowed down. Travelers’ visits to South Korea were dwindled. Preventive measures, though improvised, against MERS had been constructed in a hurry, and so extinction of MERS came up with a battle against time. This paper presents what is virus infection, and classifies types, infection route, diffusion, and fatality of endemic virus infection around the world. That will contribute to establish onward a Data Base on virus infections

Keywords: MERS, Endemic virus, Pandemic